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1 Dendrites - C, highly branched, multiple processes that may have spines. 2 Chromatophilic substance - E, rough endoplasmic reticulum. 3. Axon - D, conducts impulses. 4. Cell body - B, part of neuron from which axons and dendrites extend. 5. Neurofilaments - A, fine threads in an axon.
Dendrites emerge from the neurosoma in form of multiple processes. They receive impulses from other neurons and conduct them further down to the axon (1-C).
The chromatophilic substance of the neuron is part of the RER (rough endoplasmic reticulum) and also makes a purple stain when looked at under the microscope (2-E).
The axon is the conducting part of the neuron - the axon hillock generates action potentials, while the rest of the axon conducts them (3-D).
The cell body or neurosoma is the central part of the neuron from which processes like the axon and dendrites emerge (4-B).
Neurofilaments are part of the neuron's cytoskeleton and are located in the axon (5-A).
The dendrites, often multiple and short, are never myelinated. Their surface is irregular and frequently presents lateral protrusions, the dendritic spines, which carry synaptic boutons. Dendritic spines thus increase the surface of synaptic transmission.
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